Mercury® Remanufacturing
Pro-Series Longblocks

Exclusive Features. Outstanding Value.

Built better than the original.

Remanufactured Longblock Features

Remanufactured Longblock Features

  • Marine duty gaskets
  • Hypereutectic pistons (stronger than factory pistons)
  • All new marine valves & valve springs
  • Marine cylinder heads
  • New marine water pump
  • New or polished marine camshaft - never reground!
  • Exclusive MerCruiser 350 & 377 camshaft profiles available
  • Timing cover included
  • Marine oil pan & windage tray
  • 100% Inspection Before Shipment
    • Hot Tested
    • Pressure checked
    • Compression checked
    • UV light & dye leak check
  • New high flow oil pump
  • CNC machined remanufactured MerCruiser marine block
    • Line bored Cam & mains
    • Max 0.040" CNC Overbore
    • CNC honed
    • CNC deck machining
Remanufactured Pro-Series Longblocks

Remanufactured Pro-Series Longblocks

As the original equipment manufacturer, Mercury® has the benefit of engineering resources and the experience to remanufacture a true marine-based engine. Every Pro-Series longblock is completely remanufactured with components suitable for marine applications. In fact, the valves, pistons and oil pump are all completely replaced with new pieces that have heavy-duty specifications that exceed those found in most new marine engines.